I have not sen those - what is it about their design that makes for a cleaner release off the string?

The purpose of the "Pin Nocks" (mainly the adapters) is to help eliminate damage to the arrow from tail end hits from other arrows.

The Nocks themselves (Carbon Tech McKinney) pin nocks, just have a very positive, and consistent (no variation) fit to the string, and have the smoothest transition on & off the string of any I have ever used. They grip the string just right, and are very slick on & off.

Rick, since you love the technical part of archery, you need to invent and build us a GPS tracker that will fit in our arrows. You'll get filthy rich and we'll be as happy as if we had good sense. Seriously!

Rick, since you love the technical part of archery, you need to invent and build us a GPS tracker that will fit in our arrows. You'll get filthy rich and we'll be as happy as if we had good sense. Seriously!

It's outside my field of expertise, but I have looked into it.

Currently the smallest (reliable) gps tracking device is about the size of a 50 cent piece. No way to use that on an arrow, that I can see.

There are some radio, and bluetooth arrow/game tracking devices available.

I wouldn't use any of them anyway, because they force you have to retune you setup in order to shoot with them on the arrow.

Once I get the setup tuned how I want it, I use it for everything, and don't like having to change it in order to from hunting to target shooting, and back again.

I have used pin nocks for years when target compound shooting. I have not used them with trad gear, yet anyway. I came real close to buying some when I built my target arrows a few months back but decided to go with "regular" nocks.